Optimization for Biodiesel Fuel Production and its Application on the Electronically Controlled Common Rail Diesel Engine

生物柴油製備工藝優化及其在電控共軌柴油機上的應用研究

許廣舉(Guang-Ju Xu) ； 李銘迪(Ming-Di Li) ； 陳慶樟(Qing-Zhang Chen) ； 李學智(Xue-Zhi Li)

《中國機械工程學刊》 36卷5期 (2015/10) Pp. 431-438

摘要

本文旨在探讨生物柴油制备工艺优化方法及其在高压共轨柴油机上应用的可行性。基于正交试验和神经网络理论方法，考察了醇油比、催化剂浓度、反应温度、反应时间等参数对生物柴油产量的影响。完成了柴油机燃用BD5 生物柴油的1000 小时可靠性试验，测量了柴油引擎的燃料消耗，润滑油消耗，功率，扭矩，活塞漏气量、排气温度等参数的变化情况。研究结果表明，可靠性试验后，柴油机的燃油消耗率有所增加，功率，扭矩和排气温度等参数存在不同程度下降，活塞漏气量增加，生物柴油中的不饱和脂肪酸甲酯容易引起润滑油变质，柴油引擎能够长期燃烧生物柴油，但润滑油更换周期应相应缩短。

並列摘要

The biodiesel production technics was optimized based on the orthogonal test and neural network theory, parameters such as alcohol-oil ratio, catalyst concentration were used as the input parameters, and the biodiesel yield was used as the output parameters. Having completed the 1000-hours reliability test of a diesel engine fueled with BD5 biodiesel. Having measured the engine parameters, such as fuel consumption, lubricant oil consumption, power, torque, piston leakage volume, and exhaust temperature before and after the reliability test. Having analyzed the lubricants chromatographic and the durability of main engine parts. We can see that the best production parameters were, alcohol-oil ratio （6:1）, catalyst concentration（1.0%）, reaction temperature （40°C）, reaction time (60min). the neural network model can predict the yield very exactly. The diesel engine could burn biodiesel fuel for long-term without problems and the specific fuel consumption and oil consumption increases slightly after the reliability test. The power, torque and exhaust temperature decreases at different degrees, but the piston leakage volume increases. The engine lubricating oil contains unsaturated fatty acid methyl ester and arouses lubricants metamorphism. Some carbon depositions exist in the fuel injector, the valve and the piston. Small scratches could be found in the piston skirt and piston ring as a result of normal attrition. These changes were the same under the situation when diesel engine burning with diesel fuel.

並列關鍵字

Biodiesel ； artificial neural network ； engine ； reliability ； performance ； pollutants.